# CVE-2026-102371: wsl-pro-service: In wsl-pro-service before 0.1.19ubuntu3, the service component which runs as root inside each WSL instance attaches t...

CVE-2026-102371 is fixed in wsl-pro-service on 1 platform, first by wsl-pro-service 0.1.19ubuntu2.1, released September 29, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-102371
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0011
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 29, 2026

## Description

In wsl-pro-service before 0.1.19ubuntu3, the service component which runs as root inside each WSL instance attaches the instance to Ubuntu Pro by executing the pro client with the Ubuntu Pro token passed as a command-line argument (pro attach <token>). On systems where /proc is mounted without process-hiding mitigations (such as hidepid), which is the default in WSL, an unprivileged local user or process in the same WSL instance can read the token from /proc/<pid>/cmdline while the attach process is running. The leaked token could then be used to attach other machines to the victim's Ubuntu Pro subscription and gain unauthorized access to Ubuntu Pro services.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | wsl-pro-service Ubuntu 20.04 LTS (focal) | 0.1.18~20.04.2+esm1 | [wsl-pro-service 0.1.18~20.04.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-wsl-pro-service-0.1.18-20.04.2-esm1.md) | Oct 7, 2026 |
| Linux | wsl-pro-service Ubuntu 22.04.1 LTS (jammy) | 0.1.18~22.04.3 | [wsl-pro-service 0.1.18~22.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-wsl-pro-service-0.1.18-22.04.3.md) | Oct 7, 2026 |
| Linux | wsl-pro-service Ubuntu 24.04.5 LTS (noble) | 0.1.18~24.04.4 | [wsl-pro-service 0.1.18~24.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-noble-wsl-pro-service-0.1.18-24.04.4.md) | Oct 7, 2026 |
| Linux | wsl-pro-service Ubuntu 26.04.1 LTS (resolute) | 0.1.19ubuntu2.1 | [wsl-pro-service 0.1.19ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-wsl-pro-service-0.1.19ubuntu2.1.md) | Sep 29, 2026 |

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Data as of 2026-11-09T13:31:49Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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